quagga locks with command sh ip bgp
It is possible to caue the quagga daemon and consume large quantities
of CPU and stop responding. If a remote user is able to connect to
the telnet interface, it becomes possible to issue a commmand that
will DoS quagga.
More information can be found here.
http://www.quagga.net/news2.php?y=2006&m=5&d=4#id1146764580
This issue also affects FC4